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3.
Interface
Connector
Interface
Pin
No.
Signal
l
SERIAL
SRQ
2
G N D
3
SERIAL
ATN
4
SERIAL
CLK
5
SERIAL.
DATA
6
RES
1.5
a.
Use
the enclosed
connecting
cable to
connect
the
printer to
your computer.
Plug
one end
of
the 6-pin
connector
cable into
the 6-hole
Serial
Port
on your computer.
Plug
the other
end
of
the 6-pin
connector
into the 6-hole
connector of your
printer.
If
you
are
facing the
back
of
the
printer, the
connector
hole
is
in
the
lower
left
(see figure
1.2).
b.
Select the device
number
.
1.6
Device
Selector
Switch
Just
as
your computer
has
different
character
modes,
so
does
your
printer.
To
choose
either the
GRAPHICS/UPPER CASE
or
UPPER CASE/LOWER CASE
mode, you must
assign a
SECONDARY ADDRESS
(SA)
so that the printer prints
in
the
same
mode
that
you've chosen
for
your computer. The
secondary address can
either
be
or
7.
SA
=
0:
"CURSOR
UP"
(graphics/upper
case)
Mode
SA
=
7:
"CURSOR DOWN"
(upper
case/lower
case)
Mode
If
there
is
an
error
in
your program
that pertains to printer
operation,
your
printer
will
stop printing
and
the appropriate
error
message
will
appear
on
the screen
of
your computer.
User
defined
machine
language
IRQ
routines
should
not
ex-
ceed 10 milliseconds.
If
this
is
done,
the printer
may
give
"Device
not present"
error.
5.
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